REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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Sunday, 22 December 2019

REPAIRING / SERVICING TV SAMSUNG LE32B653T5W

Technical description and composition of the SAMSUNG LE32B653T5W TV, panel type and applicable modules. The composition of the modules.
SAMSUNG
Model: LE32B653T5W
Chassis / Version: N68A
Panel: T315HW02
Inverter (backlight): integrated into PSU
PWM Inverter: SEM2006
MOSFET Inverter: 4N50
Trans Inverter: FLT-HU32
Power Supply (PSU): BN44-00261A
PWM Power: FAN7530 (PFC), STR-W6252
MOSFET Power: 6N60
MainBoard: BN41-01167C
IC MainBoard: WM8593SEF-T, STA339BW, TEA6425D, K4T1G164QE-HCE7
Tuner: BN40-00145A TDHG6-K12A
Technical Specifications LE32B653
SAMSUNG LE32B653T5W
General repair guidelines for TV LCD
Possible manifestations of defects
- The SAMSUNG LE32B653T5W TV does not turn on and does not show any signs of operability. There is no reaction to the remote control and control buttons from the front panel.
With such manifestations, a malfunction is most likely to be detected in the BN44-00261A power module. It is necessary to measure the output voltage, and in case of their absence, check the serviceability of the power switches (6N60) of the converters and rectifier diodes for possible breakdown (short circuit).
In case of breakdowns in the secondary circuits, the converter can emergencyly operate in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks. The health of the PFC node can be indirectly judged by the presence of an increased voltage (380-400V) on the filter of the network rectifier.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch may be PWM (PWM) FAN7530 (PFC), which is checked by replacing a known-good one.
- There is no image, there is sound, it reacts to the remote control, channels are switched. In some cases, the image appears when you turn on and immediately disappears.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or inverter. If all the electrolytic capacitors of the filter for the power supply of the inverter are working, make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during operations, and after their completion, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The TV does not turn on, the indicator signals standby or working mode, or blinks.
Repair or diagnostics of the BN41-01167C motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you should update or replace the software (software). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard board - WM8593SEF-T, STA339BW, TEA6425D, K4T1G164QE-HCE7. In cases where the BGA processor is used, its malfunction is usually detected by local heating.
Before replacing the tuner BN40-00145A TDHG6-K12A, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
TV users and owners need to remember that attempts to self-repair a SAMSUNG LE32B653T5W TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!

 SCHEMATICS:  Samsung LE32B550 Chassis N68A.

FOR MODELS: LE32B55*, LE37B55*, LE40B55*, LE46B55*, LE32B65*, LE37B65*, LE40B65*, LE46B65*, LE55B65*, LE32B57*, LE37B57*, LE40B57*, LE46B57*, LE32B67*, LE37B67*, LE40B67*, LE46B67*, LE55B67*, LE40B62*, LE46B62*, LE52B62*, LE40B75*, LE46B75*, LE52B75*.

PSU SCHEMATICS Samsung BN44-00261A Power supply.



 The appearance of the MainBoard BN41-01167C is shown in the figure below:
BN41-01167C
BN41-01167C can be used in TVs:
SAMSUNG LE32B550A5 (Panel LTF320HA09), SAMSUNG LE32B653T5W (Panel T315HW02), SAMSUNG LE32B652T4W (Panel T315HW02 V.3), SAMSUNG LE37B653T5W LE37B653 (Panel T370HW02 V.E).
The appearance of the power supply
Main features of the SAMSUNG LE32B653T5W device:
Installed matrix (LCD panel) T315HW02.
To power the backlight, a converter is used, combined with a power supply, controlled by a PWM controller SEM2006. The transformer FLT-HU32 is installed in the inverter converter. As power elements of the inverter, keys of type 4N50 are used.
The necessary supply voltages for all nodes of the SAMSUNG LE32B653T5W TV are generated by the BN44-00261A power module or its analogs using FAN7530 (PFC), STR-W6252 microcircuits and 6N60 type power switches.
MainBoard - the main board (motherboard) is a module BN41-01167C, using microcircuits WM8593SEF-T, STA339BW, TEA6425D, K4T1G164QE-HCE7 and others.
The tuner BN40-00145A TDHG6-K12A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: T315HW02 V0 CELL
Type: a-Si TFT-LCD, CELL
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA3, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Glass Depth: 0.70 + 0.70 mm
Transmissivity: 4.0% (with Polarizer)
Contrast Ratio: 4000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V

Posted By: FRANK at 10:03
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